0000100
0001000
1000000
0101000
1010001
0001000
1010100
0101000
1010001

There are actually 63 different locations to punch each card, but I suspect that there are only 32 (at the most) that can be punched without combining perforations, which then would cause stability issues with the card smoothly going into the reader slot.

I am not sure how to do the math for the number of different possible combinations from there.

However, I think there is enough information here for you to 'read' the other card.

Seriously though, I have a couple on Ving keys that I know I got from a casino, but unless it was recorded on the card, there is no way to recover that casino/hotel name from the card/key alone.

Jim